Sorting a JSON based on date I want to sort a json based on the date inside period but it also contains other string(MAT TY and MAT YA) values which we have to keep in the front of list always(MAT TY first then MAT YA after) and the sorted items after that so how do i do it? Here's the JSON response: [{ "Period": "MAT YA", "StartUnit": null, "EndUnit": null, }, { "Period": "DEC 2018", "StartUnit": null, "EndUnit": null, }, { "Period": "NOV...

Updating a clock in main activity Im trying to get into Android Development and want to create a simple app, that shows the current time in a TextView and updates every minute. I managed to get the time initialized, but can't figure out how to update it. I googled a lot and am now trying to create a broadcast receiver that updates the TextView. That's what I got so far: AndroidMainfest.xml...

simplest way to apply multiple queries for firebase database in android I am wondering if it is possible to apply multiple queries for firebase database in android/kotlin.(my code is in Kotlin) I have a firebase database which has time value in it. what I need to get is i want to have sales report hourly based. I get this for 1 hour but, when I try it for another hour I dont get the result. I beleive I am doing something wrong here logically. val rootRef =...

How to use ePub in Android In my application i want use ePub reader and for this i find this library : https://github.com/FolioReader/FolioReader-Android But this library not support RTL swipe in horizontal scrolling! How can i set RTL for this library? Or can you suggest to me other libraries for this work?

unable to access recylerview.adapter in kotlin I am trying to access recylerview.adapter from an activity in kotlin but its not accessible as i have imported androidx.appcompatabblity wheares somewhere else in other project where i use app.appcompatablity it is being accessed. kindly help me. Following below is the code snippet where mainlist is the recylerview object which is trying to access adapter property but it is not being accessed override fun setItems(items: List) { mainlist.adapter = MainAdapter(items,...

Android Google Maps - Shortest distance to Polyline wrong I am developing a feature to measure closest distance to a drawn Polyline segment from the user's current location. I implemented this using Google's utility lib - PolyUtil but it gives me bad results. Can someone explain what i got wrong here? Code: var closestSegment: Result2? = null var minDistance = Double.MAX_VALUE for (i in 0 until selectedLine.points.size - 1) { val startPoint = selectedLine.points[i]...

First ImageView dissapeard after second ImageView was added to the RelativeLayout After adding a second ImageView to the RelativeLayout, the first and the second image view do not show. How can I fix it? val hideImage = ImageView(ctx) hideImage.setImageResource(R.drawable.hiding_box) hideImage.id = hiderImageIds[0] params.leftMargin = 0 params.topMargin = 0 hiderLayout.addView(hideImage, params) val hideImage2 = ImageView(ctx) hideImage2.setImageResource(R.drawable.hiding_box) hideImage2.id = hiderImageIds[1] params.leftMargin = hiderImageWidth params.topMargin = 0...

Kotlin nested when I have the next code. As you may see there are 3 when one inside another. Is it possible to flatten this code? I'm thinking about some wrapper but cannot get it. For now the only solution that I see is to move each when to the fun like processFirstWhen etc. Perhaps there is a cleaner solution. Any help appreciated. when (val result = callback.invoke()) { is DataCompletable.Success -> DomainCompletable.Success is DataCompletable.Error -> when...

How to get current date in android? (not from system settings) Is there any way to get the current date in android? I mean exactly the current date, and not the one that is in the settings, because you can put any date in the settings. For this reason, new Date() and Calendar.getInstance().getTime() are not solutions.

Cant use Mockito when and thenReturn I am trying to write mockito when method so that when a method is called then I can define a returned data. The java method for it is : when(myRepository.insertNote(any(Note.class))).thenReturn(returnedData); and in kotlin I am trying to write the same but its not showing me the option to write thenReturn() after when(). So i am trying: when(mainRepository.fetchApiresultFromClient(ArgumentMatchers.anyString(), ArgumentMatchers.anyString(),ArgumentMatchers.anyString(),...

Encode URL in Ktor Client I need to make a GET request using a Ktor client. The URL I'm using is passed to me as a string from a source I have no control over. The URL string contains commas that are encoded by the Ktor client to %2C which is breaking the backend logic. Is there a way to prevent Ktor from encoding the URL? Example to clarify: client.get { url(url) accept(ContentType.Application.Json) method = HttpMethod.Get } In the following code, the value of url is...

How to add an airplane marker correctly on non geodesic line between to points on Google map I'm able to add an airplane marker on Google map(Android/Kotlin) as you may see here Only problem is that the airplane marker doesn't coincide on the flight path(non geodesic). I'm using this method to calculate bearing private fun bearing(origin: LatLng?, destination: LatLng?): Double { var retVal = 0.0 if (origin != null && destination != null) { val lat1 = origin.latitude...

How set locale in smooks is there a way to set locale en-US in smooks? I have a problem with decimal numbers when I launch the application in my local becouse: Locale.getDefault().toLanguageTag() == "it-IT" so I would like that smooks always take locale like en-US

How to read data from Firebase DB I have a DB structure like below, I can read the data "email", "email2","nameSurname" and "uid" values from DB with the code below, var ref = FirebaseDatabase.getInstance().reference var query =ref.child("users") .child("8fyg1p7CwdhDq2mxZYsCSXOWVFe2") query.addListenerForSingleValueEvent(object : ValueEventListener{ override fun onCancelled(p0: DatabaseError) { } override fun onDataChange(p0:...

Handle exception both in coroutine handler and try-catch block If we have for example base handler like protected val baseHandler = CoroutineExceptionHandler { _, e -> handleError(e) } And execute our code via try-catch block scope.launch(baseHandler){ try{ throw ... } catch(e:Exception) { } Is it possible to handle exception firstly in catch block and as a fallback in base handler? The goal of this code is to have a base exception handler for all project coroutines.

Creating folder in internal memory in android I want to create a folder in the root of internal memory in Android. I'm using the following code to do so: Environment.getExternalStorageDirectory().path.toString() + "/" + "folder name" or val directory = File(Environment.getExternalStorageDirectory(), "folder name") It works in some devices or emulators, but not all of them, so I am confused. Can anyone tell me what is happening? (The issue is not dependent on Android API level).

Android Locale change (Application and activity context issue) I want to implement in-app language change in Android application. So I implemented it via standard way as I've seen on the internet, and I've come up with one issue. When I've changed locale and recreated activity, I got localized labels as I wanted, but only the labels I'm setting in xml or fragment. If I set labels using kotlin extensions, or from viewModel, I get labels on device language (which is different than application language that I set programatically). I found out that if I'm...

Kotlin read and display data from Google Sheets Can somebody help me accomplish what I am trying to. I have spent hours watching videos and surfing Google to do it myself. But, I couldn't as there's no help I could find to read just one cell value from Google Sheets and I couldn't also find code for Kotlin. All what I want is to display the value in cell B2 in my Google sheets in a textview on MainActivity. I am new to Android app development. Thanks in advance.

How to parse error coming from the server in Volley in Kotlin I want to get the exact error message returned from the server in Kotlin. I am currently handling as below Response.ErrorListener {error -> // regProgress.hide() val resp = error if(error is ClientError ){ Toast.makeText(context!!.applicationContext, "User already exists", Toast.LENGTH_SHORT).show() } else if(error is...

In android how to unit test for a class is equal to another class where both classes are wrapped around by a wrapper class I am using a wrapper class GenericApiResponse for api response: sealed class GenericApiResponse { companion object { fun create(error: Throwable): ApiErrorResponse { return ApiErrorResponse(error.message ?: "unknown error") } fun create(response: Response): GenericApiResponse { if(response.isSuccessful){ val body = response.body() if (body == null || response.code() == 204) { return ApiEmptyResponse() }...

What is the difference between context and activity inside a fragment? When I’am inside a fragment what is the difference between this.context and this.activity Eg: val intent = Intent(this.activity!! , Activity::class.java) val intent = Intent(this.context!! , Activity::class.java)

How to prevent creation of realm object on other class realmList property in android i am trying to create an app like Point of Sale, where user can create a sale transaction offline and online. I'm using Realm as the database. The goal here is to enable the user to create a store transaction of certain available products. Here is the Product class and StoreTransaction class Product.kt open class Product( var barcode: String? = null, var name: String? = null, var price: Double? = null, var quantity: Double? = null ) : RealmObject() StoreTransaction.kt...

How to return data from interface I've a function like below, trying to read data from Firebase DB, counting them and finally return the count number. But "ad_count" value is always 0. Somehow I can't pass the data from "onDataChange". How can I do that? Thanks. fun count():Int{ var ad_count :Int = 0 var ref = FirebaseDatabase.getInstance().reference var query =ref.child("users") .child(FirebaseAuth.getInstance().currentUser!!.uid) query.addListenerForSingleValueEvent(object...

ViewTreeObserver.OnGlobalLayoutListener on each and every recycler view items to passively resize TextView automatically I have a plain basic recycler view and its adapter. In the single recycler view row, I got a textView which are floating numbers. The textView width length shall fixed in proportional sizes, i.e. 30 % of the screen. I want to put OnGlobalLayoutListener to auto resize text downward passively whenever the text exceed over the separator line so that it fits in the textView box prepared. I don't want WRAP the numbers So I add OnGlobalLayoutListener on each ViewHolder and expect to detect &...

kotlin.KotlinNullPointerException (no error message) while building APK using Jenkins I am new to Jenkins and trying to generate APK. I have added git credentials and gradle script is as below: Note: I have a build Type named "Dev"

How to convert an activity to a fragment I wrote the code for an activity i will have to change it to a fragment. It will have to run multiple times so it is better to be a fragment. Kindly help me with this I wrote in Kotlin language class AddInformation: AppCompatActivity() { var id=0 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_add_info) var bundle: Bundle = intent.extras!! var Enum = bundle.getInt("ItemNos") ItemNo.text=...

Distinguish between short tap (click) and long press in OnTouchListener I already found this answer: Distinguish between long press and short press on a hardware button But I'm interested in OnTouchListener. The reason is that I want that a short press and release (click) will trigger a certain behavior, but long press (without release) will trigger a motion event to enable the user to drag the widget with their finger. So I'm using...

How to add multiple headers in retrofit responses in Android In my application i want get some data from server and for this i used retrofit. I should add some Headers but after run application show me ForceClose error! ApiServices codes : interface ApiServices { @Headers( "Accept: application/json", "Content-Type : application/json" ) @POST("user/get-password") fun sendPhoneNumber(@Body body: LoginSendPhoneBody): Single @Headers( "Accept: application/json", "Content-Type : application/json"...

Exoplayer2 Streaming HLS Videos , Sometimes plays video with sound only(video not played) I implement exoplayer2 in my app for playing HLS Videos, but sometimes it plays just sound, and doesn't work correctly. What am I supposed to do? I couldn't find why this happens sometimes. this is the code for initializing player : fun initPalyer(){ val mainHandler = Handler() val bandwidthMeter: BandwidthMeter = DefaultBandwidthMeter.Builder(context).build() bandwidthMeter.addEventListener(mainHandler!!, this) val trackSelectionFactory: TrackSelection.Factory =...

is it necessary to update apps on play store? i know that i am not asking about coding but i think it is reasonable to ask on this community . i am app developer and i am working in a product company which has more than 50 apps on play store . most of the apps have only 10 - 50 users except 2 or 3 apps . our project manager says to update everything in app . although some apps have been updated before 2 or 3 months . some apps already looking fine and i think thay do not need update . we just update color of app and app icon and i...